Improvement of atrial signal-averaged electrocardiographic abnormalities after radiofrequency catheter ablation in persistent atrial flutter.

Japanese heart journal Pub Date : 2004-09-01 DOI:10.1536/jhj.45.761

Fumiharu Miura, Hidekazu Hirao, Yukiko Nakano, Hiroki Teragawa, Tetsuji Shingu, Kazuaki Chayama

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Abstract

It has been reported that abnormalities of atrial conduction are present in patients with atrial flutter (AFL). We analyzed the P wave signal-averaged ECG (PSE) in patients after cardioversion of chronic AFL by radiofrequency catheter ablation (RFCA) to determine whether abnormalities of atrial conduction exist in patients with AFL and whether they recover. We studied 11 patients undergoing ablation of persistent AFL (AFL group), 11 patients with paroxysmal AFL (PAFL group), and 14 patients without any evidence of arrhythmias (control group). The PSEs were recorded 1 day, 7 days, and 1 month after RFCA. The filtered P wave duration (FPD) was calculated from the PSE recording. The FPD correlated with interatrial conduction time (r = 0.644) and left atrial dimension (r = 0.675) in combined assessment of the AFL and PAFL groups. The FPD was longer in the AFL group 1 day (165 +/- 14 ms, P < 0.001) and 1 month (150 +/- 18 ms, P < 0.05) after RFCA than in the control group (134 +/- 10 ms). Our findings suggest that atrial conduction abnormalities detected by PSE are present in patients with persistent AFL and improve 1 month after cardioversion.

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持续性心房扑动射频消融后房信号平均心电图异常的改善。

据报道，心房扑动(AFL)患者存在心房传导异常。我们分析经射频导管消融(RFCA)转复慢性AFL患者的P波信号平均心电图(PSE)，以确定AFL患者是否存在心房传导异常以及是否恢复。我们研究了11例持续性AFL患者(AFL组)，11例阵发性AFL患者(PAFL组)和14例无心律失常证据的患者(对照组)。分别于术后第1天、第7天和第1个月记录pse。滤波后的P波持续时间(FPD)由PSE记录计算。AFL组和PAFL组FPD与房间传导时间(r = 0.644)、左房尺寸(r = 0.675)相关。AFL组的FPD在RFCA后1天(165 +/- 14 ms, P < 0.001)和1个月(150 +/- 18 ms, P < 0.05)长于对照组(134 +/- 10 ms)。我们的研究结果表明，PSE检测到的心房传导异常存在于持续性AFL患者中，并在心律转复1个月后改善。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Japanese heart journal

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